[linux-lvm] LV, VG, and PV information not available after vgcfgrestore

From: "Smith, Troy (NIH/NCI) [C]" <trsmith mail nih gov>

To: <linux-lvm redhat com>

Subject: [linux-lvm] LV, VG, and PV information not available after vgcfgrestore

Date: Mon, 17 Dec 2007 10:42:42 -0500

Hello all.

I recently migrated a logical volume from a failing host to
a new host, and although I am able to mount and access the volume, I cannot
view any of the LV information using lvdisplay, vgdisplay, or pvdisplay.

The physical volume is SAN mounted. The
/etc/lvm/backup/file was copied from the failing host to the new host, and
using vgcfgrestore and vgchange, the LV’s are now mounted on the new host
and completely accessible. However, when I run any of the display or scan
commands, information regarding these volumes does not appear. I’m
wondering if I missed a step in recovery. Following are the steps I
followed:

-on source host, unmounted the file system using the LV in
question

-presented LUN the LV is on to the new host, and discovered

-coped /etc/lvm/backup/file from source to target

-on target host, vgcfgrestore on the copied backup file

-on target host, lvscan. The LV was recognized, but
not active.

-vgchange to activate the LV

-another lvscan showed the LV active

-modifed target host:/etc/fstab

-mounted the LV on the target host without issue.

Is there another step or two (or more) that I should have
executed prior to mounting or even recovering the LV?